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ron · 09-07-2012, 01:22 AM

the compression may help but the older 66 I think it was has a smaller cu in engine and smaller wheel base (lighter) so more mileage is possible.

09-07-2012, 01:22 AM	#102 (permalink)
ron Master EcoModder Join Date: Nov 2011 Location: slo county ca. Posts: 277 double eagles - '99 Dodge ram slt Team Cummins 90 day: 19.48 mpg (US) Thanks: 24 Thanked 17 Times in 16 Posts	the compression may help but the older 66 I think it was has a smaller cu in engine and smaller wheel base (lighter) so more mileage is possible.